Instruction/ maintenance manual of the product CYDC256B16 Cypress
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1.8V 4k/8k/16k x 16 and 8k/16k x 8 ConsuMoBL Dual-Port S t atic RAM CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Cypress Semiconductor Corpora tion • 198 Champion Cou rt • San Jose , CA 95134-1 709 • 408-943-2 600 Document #: 001-01638 Rev .
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 2 of 26 Notes: 1. A 0 –A 11 for 4k devices; A 0 –A 12 for 8k devices; A 0 –A 13 for 16k devices. 2. BUSY is an output in master mode and an input in slave mode.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 3 of 26 Pin Configurations [3, 4, 5, 6, 7] Notes: 3. A12L and A12R are NC pins for CYDC064B16. 4. IRR functionality is not supported for the CYDC256B 16 device.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 4 of 26 Notes: 8. IRR functionality is not supported for the CYDC128B 08 device. 9. Thi s pin is A 13L for CYD C128B08 devices. 10. This pin is A13R for CYDC128B08 devices.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 5 of 26 Functional Description The CYDC256B16, CYDC128B16 , CYDC064B16, CYDC128B08, CYDC064B08 are lo w-power CMOS 4k, 8k,16k x 16, and 8/16k x 8 dual-port static RAMs.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 6 of 26 then the SEM pin must be asserted instead of th e CE pin, and OE must also be asser ted. Interrupts The upper two memory locati ons may be used for message passing.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 7 of 26 When reading a semapho re, all sixteen/eight data lines output the semaphore value. The read value is latched in an output register to prevent the semapho re from changing state during a write from the o ther port.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 8 of 26 T ab le 3. Inpu t Read Register Operation [16, 19] SFEN CE R/W OE UB LB ADDR I/O 0 – I/O 1 I/O 2 – I/O 15 Mode HLHL L L x 0 0 0 0 - M a x V A L I D [17] VA L I D [1 7] S tandard Memory Access L L H L X L x0000 V ALID [18] X IRR Read T able 4.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 9 of 26 Maximum Ratings [23] (Above which the useful life may be impaired. For user guide- lines, not tested.) S torage T emperature ............. .........
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 10 of 26 I IX Input Leakage Current 1.8V 1.8V –1 1 –1 1 µ A 2.5V 2.5V –1 1 –1 1 µ A 3.0V 3.0V –1 1 –1 1 µ A I CC Operating Current (V CC = Max.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 1 1 of 26 Electrical Characteristics for V CC = 2.5V Over the Operating Range Parameter Description CYDC2.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 12 of 26 Electrical Characteristics for 3.0V Over the Operating Range Parameter Description CYDC256B16, C.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 13 of 26 7 AC T est Loads and W aveforms Switching Characteristics for V CC = 1.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 14 of 26 t HA Address H old From W rite End 0 0 ns t SA [28] Address Set-up to W rite S tart 0 0 ns t PWE.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 15 of 26 Switching Characteristics for V CC = 2.5V Over the Operating Range Parameter Description CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Unit -40 -55 Min.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 16 of 26 Interrupt Timing [33] t INS INT Set T ime 35 45 ns t INR INT Reset T ime 35 45 ns Semaphore T im.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 17 of 26 t HZWE [30, 31] R/W LOW to High Z 15 25 ns t LZWE [30, 31] R/W HIGH to Low Z 0 0 ns t WDD [32] W.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 18 of 26 Switching W aveforms Read Cycle No.1 (Either Port Address Access ) [36, 37, 38] Read Cycle No.2 (Either Port CE /OE Access) [36, 39, 40] Read Cycle No.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 19 of 26 Write Cycle No.1: R/W Controlled T iming [41, 42, 43, 44, 45, 46] Write Cycle No. 2: CE Controlled T iming [41, 42, 43, 48] Notes: 43. t HA is me asured fro m the ea rlier of CE or R/W or (SEM or R/W ) going HIGH at the end of write cycle.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 20 of 26 Semaphore Read After W rite Timing, Either Side [49, 50] Timing Diagram of Semap hore Contention [51, 52] Notes: 49.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 21 of 26 Timing Diagram of Read with BUSY (M/S =HIGH) [53] Write T iming with Busy Input (M/S = LOW) Note: 53.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 22 of 26 Busy Timing Diagram No.1 (CE Arbitration) Busy Timing Diagram No.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 23 of 26 Interrupt Timing Diagrams Notes: 55. t HA depends on which enable pin (CE L or R/W L ) is deasserted first . 56. t INS or t INR depends on which enable pin (CE L or R/W L ) is asserted last.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 24 of 26 Ordering Information 16k x16 1.8 V Asynchronous Dual-Por t SRAM Spee d (ns) Orderin g Code Packa.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 25 of 26 © Cypress Semi conductor Corpora tion, 2006. The information con tained he rein is subject to change wit hout notice.
CYDC256B16, CYDC128B16, CYDC064B16, CYDC128B08, CYDC064B08 Document #: 001-01638 Rev . *E Page 26 of 26 Document History Page Document Title: CYDC256B16/CYDC128B16/CYDC06 4B16/CYDC 128B08/CYDC064B08 1.8V 4 k/ 8k/16k x 16 and 8k/16k x 8 ConsuMoBL Dual-Port St atic RAM Document Number: 00 1-01638 REV .
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